The X-Ray Pulsar XTE J1858+034 Observed with NuSTAR and Fermi/GBM: Spectral and Timing Characterization plus a Cyclotron Line
| dc.contributor.author | Malacaria, C. | |
| dc.contributor.author | Kretschmar, P. | |
| dc.contributor.author | Madsen, Kristin | |
| dc.contributor.author | Wilson-Hodge, C. A. | |
| dc.contributor.author | Coley, Joel B. | |
| dc.contributor.author | Jenke, P. | |
| dc.contributor.author | Lutovinov, Alexander A. | |
| dc.contributor.author | Pottschmidt, Katja | |
| dc.contributor.author | Tsygankov, Sergey S. | |
| dc.contributor.author | Wilms, J. | |
| dc.date.accessioned | 2022-08-15T21:00:40Z | |
| dc.date.available | 2022-08-15T21:00:40Z | |
| dc.date.issued | 2021-03-15 | |
| dc.description.abstract | Accreting X-ray pulsars (XRPs) undergo luminous X-ray outbursts during which the spectral and timing behavior of the neutron star can be studied in detail. We analyze a NuSTAR observation of the XRP XTE J1858+034 during its outburst in 2019. The spectrum is fit with a phenomenological, a semiempirical, and a physical spectral model. A candidate cyclotron line is found at 48 keV, implying a magnetic field of 5.4 × 1012 G at the site of emission. This is also supported by the physical best-fit model. We propose an orbital period of about 81 days based on the visual inspection of the X-ray outburst recurrence time. Based on Fermi/GBM data, the standard disk accretion-torque theory allowed us to infer a distance of 10.9 ± 1.0 kpc. Pulse profiles are single-peaked and show a pulsed fraction that is strongly energy-dependent at least up to 40 keV. | en_US |
| dc.description.sponsorship | This research has made use of data and software provided by the High Energy Astrophysics Science Archive Research Center (HEASARC), which is a service of the Astrophysics Science Division at NASA/GSFC and the High Energy Astrophysics Division of the Smithsonian Astrophysical Observatory. We acknowledge extensive use of the NASA Abstract Database Service (ADS). C.M. is supported by an appointment to the NASA Postdoctoral Program at the Marshall Space Flight Center, administered by the Universities Space Research Association under contract with NASA. The contribution by K.P. is supported by NASA under award number 80GSFC17M0002. A.A.L. and S.S.T. acknowledge support from the Russian Science Foundation (grant 19-12-00423). | en_US |
| dc.description.uri | https://iopscience.iop.org/article/10.3847/1538-4357/abddbc | en_US |
| dc.format.extent | 7 pages | en_US |
| dc.genre | journal articles | en_US |
| dc.identifier | doi:10.13016/m20jrr-zpab | |
| dc.identifier.citation | Malacaria, C. et al. “The X-Ray Pulsar XTE J1858+034 Observed with NuSTAR and Fermi/GBM: Spectral and Timing Characterization plus a Cyclotron Line”, The Astrophysical Journal, vol. 909, no. 2, 2021. doi:10.3847/1538-4357/abddbc. | en_US |
| dc.identifier.uri | https://doi.org/10.3847/1538-4357/abddbc | |
| dc.identifier.uri | http://hdl.handle.net/11603/25412 | |
| dc.language.iso | en_US | en_US |
| dc.publisher | AAS | en_US |
| dc.relation.isAvailableAt | The University of Maryland, Baltimore County (UMBC) | |
| dc.relation.ispartof | UMBC Center for Space Sciences and Technology | |
| dc.relation.ispartof | UMBC Faculty Collection | |
| dc.relation.ispartof | UMBC Physics Department | |
| dc.rights | This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law. | en_US |
| dc.rights | Public Domain Mark 1.0 | * |
| dc.rights.uri | http://creativecommons.org/publicdomain/mark/1.0/ | * |
| dc.title | The X-Ray Pulsar XTE J1858+034 Observed with NuSTAR and Fermi/GBM: Spectral and Timing Characterization plus a Cyclotron Line | en_US |
| dc.type | Text | en_US |
| dcterms.creator | https://orcid.org/0000-0003-1252-4891 | en_US |
| dcterms.creator | https://orcid.org/0000-0002-4656-6881 | en_US |